Concrete ash-pit.



PATENT@ MARs Y1o, 1908. J. W. GRAHAM s; o. A, mms.

CONCRETE ASH PIT.

APPLIOATION FILED JUNE a, 1907.

Unirnn sTAfrnbs PATENT oir-FICE.

JAMES W. GRAHAM, OF ST. LOUIS, AND CHARLES A. JONES, OF MIDLAND,MISSOURI.

I CONCRETE ASH-PIT.

No. eener/s.y

To all whom it may concern:

and CHARLES A. J ONES, both citizens of the' United States,and residentsof St. Louis,

Missouri, and Midland, St. Louis county, Missouri, respectively, haveinvented cer- -tain new and useful Improvements in Concrete Ash-Pits, ofwhich the following isa specification containing a full, clear, andexact description, reference being had to the accompanying drawings,forming1A a' part hereof.4

Ourv invention relates to .an ash pit, or receptacle, our object beingto construct an ash receptacle of concrete, or analogous plasticmaterial, which receptacle is very stron and durable, thoroughlyfreproof, and c eap in manufacture A further object of our invention isto con struct an ash pit, or receptacle, of concrete, or analogousmaterial, and arrange the same on a suitable base embedded in theground; v

and provide the pit, or receptacle, with a smooth interior surface, andwith a horizontally corrugated exterior surface, thereby providing anextraordinarily strong construction, and at the Sametime producing aneat and finished appearance.,

To the above purpose, our invention consists in certain novelfeatures ofconstruction and arrangement of parts, which will be hereinafter morefully set'forth, pointed out in the. claims, and illustrated in theaccompanying drawings, in which Figure 1 is a perspective view of an ashit;` Fig. 2 is a vertical section taken on the ine 2-2 of Fi 1; Fig.S-is a plan view of the forms in w ch our improved, ash pit is produced;Fig. 4 is a vertical section taken on the line 4-4 of Fig.l 3.

In the construction of our improved ash pit, we forma foundation in theround, which foundation jis, composed vof a n ody,1, of cinders, oranalogous material, on top of `which is located a layer of concrete 2.

The forms in wf. ich the wall of the recep- .tacle is formed are nowpositioned on top of `the foundation, the inner. form comprising ,aplurality having smoothsurfaces, and the ends of .said plates beingdetachably joined by bolts 4.' The outer form comprises a pluralitySpecification of Letters Patent. Application led June 3, 1907, Serial No. 376,896

of vertically disposed plates 3,

Patented March 1Q, 1908.

lof sheet metalmembers 5, which are lcorrugated, horizontally, and theends of said plates being detachably connected by bolts 6.

The lforms so constructed are concentrically arranged, and the concretein plastic form is poured into the space between the walls`of the formfand, after the concrete has become thoroughly hardened, the forms areremoved by detaching the bolts at the ends of the various sections, andthe pit, or receptacle, comprising -the vertically dis posed wall 7,having the rounded ends 8,

with the smooth interior surface 9, and the horizontally corrugatedsurface 10, is completed. The lower end of the wall 7 forms a bond withthe concrete base 2, and thus the pit or receptacle is rigidlyositioned. The smooth interior surface of t e pit permits a shovel, orlike tool, to be readlly used .in removing the contents of the pit, kandthe horizontally' corrugated exterior surface of the wall 7 givesl greatstrength to the pit, prevents the same from cracking,.and presents aneat andiinished appearance.V Pits,

or receptacles), so constructed are cheap,.

thoroulghly fireproof, and practically indestructi le. i

As a new article of manufacture, an ash pit, constructed in a singleintegral iece vand formed of hardened plastic materia and comprisingA apair of vertically disposed par.- allel side walls 7, the semifcircularend walls 8 .connecting the ends of the side walls, the inner surfacesof which side and end walls are smooth andthe exterior surfaces of saidwalls being provided with the horizontally disposed parallelcorrugations 1(4), abase 2 of plastic material imbedded in the ground,the top of 'which base is of greatervwidth than is the thickness ofthewall of the ash pit,

-and the ash pit being bonded to the base at the time ofits formation,anda sub-base 1 granular material, supporting the base.

In testimony whereof, we have signed our names to this specification, inpresence of two subscribing witnesses. l

JAMES W. GRAHAM.,

CHARLES A.- JONES.

Witnesses:

EDWARD fE. LONGAN, M. I. SMrrH.

